As it is now (0.14), the characters are cute, the writing is middling to bad, and the content is paced absolutely terribly. Forget slow burn, there is almost no actual H in this H-game. The dev pace meanwhile matches the game, slow as a snail. Adding another character when there has been no real progress with any of the family members yet is a crime. It takes a month to add like 5 minutes of dialogue and some lazy sex "animations" (As in two pictures flipping back and forth, no actual animation here folks). God help you if it's a character you don't care about, which is likely because he is planning to have 8 characters, 9 including the twink you play as. Can't even keep up the pace enough to do 4 justice in a timely manner.
The affection system is a joke, pointless padding that tests your ability to click past the looping "you spent some time together" messages as fast as possible to get to the actual events, most of which have basically no actual sexual content of any kind. There are no actual choices in this game, so kinetic novel might be a more appropriate term, if there weren't all of the pointless grinding to mask the miniscule amount of content.
I was cautiously optimistic about this game initially, the designs drew me in, and the writing seemed like it might toy with the standard tropes a little. But in the 4 months since I started following this, essentially nothing has gotten done, and the latest two patches have fallen right into the boring tropes that all futa games use, even though the game looked like it might try for something more complex than that.
Overall disappointing and a waste of time. Make character cards as close to these as possible in koikatsu yourself and you'll have a much better time. Maybe check back in 5 years, assuming this doesn't get hit with the always looming abandoned tag.